Case in Pathname Components (ANSI and GNU Common Lisp Document)

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#### 19.2.2.3 Case in Pathname Components

Namestrings always use local file system case conventions, but Common Lisp functions that manipulate pathname components allow the caller to select either of two conventions for representing case in component values by supplying a value for the `:case` keyword argument. Figure 19–2 lists the functions relating to pathnames that permit a `:case` argument:

      make-pathname    pathname-directory  pathname-name
      pathname-device  pathname-host       pathname-type

      Figure 19–2: Pathname functions using a :CASE argument